964 BROADHURST: STRUTHIOPTERIS IN NORTH AMERICA 
’ 
Alta Verapaz, ‘‘Waldungen,’ Pansamala between S. Pedro 
Cariha and Senahu, altitude 3,800 ft., von Ttirckheim 640 (N). 
Alta Verapaz, near the Finca Sepacuite, Cook & Griggs 417 and 
420 (N). 
aeeeal 
FiGuRE 1. Types of frond bases found in the North American species of 
Siruthiopteris. 
The adnate dilated bases mentioned by Liebmann are most 
characteristic of the specimens mentioned above; though no 
Mexican specimens have been seen, Liebmann’s full description 
leaves no doubt that the Guatemalan specimens belong to this 
species. 
The Costa Rican and Panama specimens examined differ in 
being more gradually reduced at the base (type C), in having pro- 
portionately broader pinnae which are more abruptly acuminate, 
and in having shorter lower pinnae (4-6 cm. long) which are more 
contracted at the base and farther apart (2-4 cm.). The a 
Costa Rican specimens, Pittier 10176 (‘‘Foréts de la Palma, 
Pacific slopes) and U. S. National Herbarium no. 575237 and no. 
575239 (both the latter without definite locality, collected by 
Wercklé, 1901-1905) are in these respects intermediate betwee? 
the Guatemalan plants and the one from Panama, Maxon 5526 
(humid forests of Cuesta de Las Palmas, southern slope of Can 
de la Horqueta, Chiriqui, altitude 1,700-2,100 ™-). since 
Pittier’s no. 10176 is the only one with a fertile frond it does not 
seem best to separate these more southern plants at present. 
2. S. exaltata (Fée) Broadh. comb. nov. 
Lomaria exaltata Fée, Mém. Foug. 11: 10. pl. 3. 1866. 
Plant terrestrial. Rhizome erect or ascending, 4-40 C™ sie 
the scales lanceolate to ovate-lanceolate, about I cm. long: 2: 
mm. wide, tobacco brown. Sterile fronds 30-90 Cm. long; a 
20-30 cm. long, slightly to decidedly angulate, marked ust 
